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32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
//===-- LibcGlue.cpp --------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// This file adds functions missing from libc on older versions of linux
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#include <cerrno>
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#include <lldb/Host/linux/Uio.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#if !HAVE_PROCESS_VM_READV
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// If the syscall wrapper is not available, provide one.
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ssize_t process_vm_readv(::pid_t pid, const struct iovec *local_iov,
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unsigned long liovcnt, const struct iovec *remote_iov,
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unsigned long riovcnt, unsigned long flags) {
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#if HAVE_NR_PROCESS_VM_READV
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// If we have the syscall number, we can issue the syscall ourselves.
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return syscall(__NR_process_vm_readv, pid, local_iov, liovcnt, remote_iov,
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riovcnt, flags);
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#else // If not, let's pretend the syscall is not present.
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errno = ENOSYS;
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return -1;
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#endif
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}
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#endif
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